pearsons



Oct. 23, 1923.

INI/EN TOR lll/1111111, i"

lklm.

mw @v WITNESS Patented oct. 23, 1923.

UNITED STATES GEORG-E T. PEARSONS, F NEW YORK, N. Y.

FIRE EXTINGUISHER.

Application filed September T 0 all w71 om t may conceit@ Be it known that I, Grenen T. PnARsoNs, a citizen ot the United States, residing in the borough ot Manhattan, in the city, county, and State ot' New York, have invented new and useful improvements in Fire Extinguishers, oi which the following` is a specification.

This invention relates to syringes adapted for lire extinquishers in which pumping mechanism is provided in a cylinder or reservoir to create an air pressure in the reservoir and such air pressure utilized. to eject a liquid contained in the reservoir, and it is the object ot the invention to provide improved means to connect the pumping mechanism with the reservoir and means to seal the pumping mechanism- 'from the liquid in the reservoir.

A. further object of the invention is to provide improved intake means to the outlet of the reservoir to automatically conneet the outlet to whichever end of the reservoir in lowermost position when the syringe is in operation, and to provide valve mechanism to control the discharge ot the liquid trom the outlet and to shut oil communication between the reservoir outlet and the reservoir.

Another object of the invention is to pro`- vide a syringe in which the reservoir has an extension oit reduced width along its side in which the pumpingr mechanism is mount ed, and a portion et larger dimensions to constitute the liquid carrying chamber of the reservoir.

In the drawing' accompanying and torming; part o1 this specification Figure 1 is a sectional sido elevation et a syringe showing an embodiment oi my invention, the section being' taken on the line 1 1 et Fig* ure 2.

Figure :2 is a cross sectional View taken substantially on the line 2-2 ot Figure 1 and looking in the direction ot the arrows.

Fig-ure 3 is a. sectional side elevation ot the piston chamber taken substantially on the line 3-3 of Figure 2; and

Figure 1 is a detail view of the operating handle.

Similar characters of reference designate like parts throughout the different views or". the drawing.

In the embodiment ot the invention shown 9, 1916. Serial No. 119,215.

in the drawing I provide a tank or reservoir for a iire extinquishing liquid, such as carbon tetrachloride, said reservoir compris ing a body portion 3 substantially of the shape shown in cross section, provided with an extension oit reduced Width a extending longitudinally oit' the side of the body portion in which the pumping` mechanism is located, and the larger portion to constitute what is herein termed the liquid carrying portion of the syringe, and the ends 5 and 6 secured thereto, as by soldering or oli-hen wise, the end 5 having,r a discharge outlet 7 and a filler opening closed by a plug 8. A pumping mechanism, as stated, is mounted in the reduced portion f1 of the reservoir to be outside ot the enlarged or liquid carrying chamber to create an ejectingj iiuid pressure in the reservoir to torcibly eject the lire entinquishing liquid from the reservoir, and consists of a piston chamber or cylinder 7 connected at opposite ends to heads 9 and 10, the head or end 10 abutting against the reservoir end 6 and the bore therein being of the same diameter as the inside diameter of the. cylinder 7 and extending through said head 10 to register with an opening of the same diameter in the reservoir end 6. The outer end oi the bore is internally screw threaded Afor the en- @agement of a flanged perforated nut 11. The engagement' ot the nut in said head 10 clamps the reservoir end between the Yflange of the nut and the head 10 thereby securing the piston chamber to said end and sunporting it therefrom. The piston chamber with its connected heads is oi less length. than the length ot the reservoir. Each ot the heads 9 and 10 has a laterally projectingm portion 12 and 13 having ports 14 and 15 communicating with the piston chamber, and the port 15 communicates with a chamber 16 having an inlet exterior of the reservoir, which inlet is closed by a plug 17 having,r a spring influence check valve ope-ning into and closing outward from said chamber. A tube 18 is secu-red at its ends in the cylinder head extensions 12 and 13 and connects port 14 with the air inlet chamber 16. The cylinder` head projections 12 and 13 lie adjacent the wall of the re duced portion of the reservoir at the juncture of said reduced portion with the reservoir portion of enlarged diameter, and the the syringe is not in use the operating handle 2a has a cap or concaved portionV 50 to straddle the nut ll, and has opposite cam slots 5l :or the engagement ot' pins 52 projecting laterally from lthe nut 1l.

Having thus described my invention I claim l. In a syringe, the combination if a reservoir to contain a liquid and having a discharge outlet; an air pump in the reservoir having an outlet; a chamber connected to t ,e pump outlet and an outlet tube for said chamber extending into said chamber from the end opposite to its connection with the pump outlet`r substantially as and for the purpose specified.

:2. In a syringe7 the combination of a reservoir to contain a liquid and having a dis` charge outlet; a piston chamber in said reservoir having an outlet; a piston to rec-ipro cate in the piston chamber; a suction air inlet to the piston chamber from the ex terior of the reservoir; a chamber connected to the outlet oit the piston chamber and having an outlet leadingl into the reservoir; a tube connected to the outlet of and extending into saidy chamber, and a spring inluenced valve the outlet end el said tube opening cutivard from and closing into the chamber, substantially as and for the pur -pose specified.

3 In a syringe, the combination of a reservo'r to contain a liquid and having a disfe outlet; a piston chamber in said reservoir having an outlet; a piston to recipeste in the piston chamber; suction air ts in tho piston chamber to opposite s ifs ot the piston 'from the exterior of the reservoir; and a chamber connected to the tlet cit the piston chamber and having an leading into the reservoir, substan` as and lor the purpose specified.

4, In a syringe, the combination of a res` eri, oir having an extension ot reduced 'width along one slee and a discharge outlet; pump` ing mechanism located in the reduced pon tion ot the reservoir to pump air into the seivoir; and an intake :tor the reservoir outlet having inlets adjacent the side and opposite ends o? the reservoir and rotatable th conii-ilete circle on an axis co-A the reservoir outlet and unobits movement by the pumping f substantially as and for the purpose specitieifl.

5. in a syringe; the combinati-on of a having a discl a reson'l'let g an ai i' iu i u the rcserixoi l. i in; an outlet and recata at the sido ol the reservoir; a chainliver c( iected to the outlet oit the pump and lizwiinr an oullet ieadiiflV into the reserifoir;

and an intake tube coi'inected to the reservoir outlet extending longitudinallj7 of the iervoir with its ends adjacent the side and opposite ends ol? the reservoir and rotatable on an axis located centrally of the reservoir, substantiallj7 as and for the purpose specilied.

6. In a syringe, the combination oi.2 a res ervoir having a discharge outlet at one end the reservoir; an air pump having an outlet in the reservoir; a tube xed at one end in the reservoir outlet and extending longitudinally of the reservoir with its free end adjacent the end oi the reservoir oppo site to the discharge outlet; and a tube exn tending longitudinally of the reservoir with its ends adjacent the side and opposite ends of the reservoir connected to the tube i'ixed in the reservoir outlet to revolve on an axis in line with the axis ot said latter tube, sub stantially as and for the purpose speeilied.

7. In a syringe, the combination of ares ervoir having a discharge outlet at one end of the reservoir; an air pump having an outlet in the reservoir; a tube lixed at one end in the reservoir outlet and extending longitudinalljT of the reservoir with its tree end adjacent the end of the reservoir opposite to the discharge outlet; a tube extending longitudinally of the reservoir with its ends adjacent the side and opposite ends ot the reservoir connected to the tube lixed in the reservoir outlet to revolve on an axis in line with the axis of sai latter tube; and a valve operable from the exterior of the reservoir to close the tree end oi" the tube fixed in the reservoir outlet; substantially as and for the purpose specified.

8. In a syringe, the combination ot a ervoir having an extension of reduced vridt" along one side and a discharge outlet at one end ot the enlarged portion of the reservoir; an air pump in the extended portion et the reservoir having an outlet leading into the reservoir; ano an intake tube for tbe dis-- charge outlet ol. the reservoir extending lonn gitudinallv of the reservoir with its ends ad acont opposite ends and the sid of the reservoir and rotatable on an axis coaxial with the reservoir outlet, substantially as and tor the purpose specified.

S). In a syringe, the combination oil a reservoir having a discharge outlet; air pump in the reservoir having air inlet suction means to opposite ends thereof 'from the exterior of the reservoir; outlet ineens :tr opposite ends of the pump into the reseiA` voir; and valves to shut oft' communication between said suction inlets and pump and the outlet means and the reservoir sul stantialljf as and orlthe purpose specified.

10. In a syringe, the combination oi a re.- ervoir ttor a liquid and having a discharge outlet; a piston chamber in the reservoir having outlets from opposite ends thereof; piston to reciprocate in said chamber; suction means to opposite ends oi the piston chamber from the exterior of the reservoir; an air chamber connected at one end taithe ian outlets of the piston chamber and having an outlet leading into the reservoir at the opposite end; and means in said chamber operaH ble to prevent the tlow of liquid Ytrom the reservoir to said chamber, substantially as and tor the purpose specified.

11. ln a syringe, the combination ot a reservoil1 having an extension of reduced Width along one side thereof to constitute a pump carrying chamber, and the enlarged portion of the reservoir constituting a liquid carrying chamber havin a discharge outlet; an air pump mounted in the pump carrying cham ber, said pump having an outlet leading into the reservoir; and intake means rotative through a complete circle connected to the discharge outlet of the reservoir; substantially as and for the purpose specified.

12. ln a syringe; the combination ot a reservoir having an extension oit reduced Width along one side thereoic to constitute a pump carrying chamber, the enlarged portion of the reservoir constituting a liquid carrying chamber having a discharge outlet; an air pump mounted in the pump carrying chamber, said pump having an outlet lea d# ing into the reservoir; and an intalre tube connected to the discharge outlet. said tube extendino` longitudinally oi the liquid carrying chamber with its ends adjacent the side and opposite ends o1"- said chamber; substantially as and for the purpose specified.

13. lnasyringe. the coi'nbination ota ref'- ervoir having an extension ot reduced wir th along one side thereof to constitute a pump carrying` chamber, and the enlarged portion of the reservoir constituting a liquid carrying chamber having a discharge outlet; an air pump mounted in the pump carrying chamber, said pump having an outlet leading into the reservoir; and a tube extending longitudinally ot the liquid carrying chamber With its ends adjacent the side and opposite ends or" said chamber. said tube being' connected to the discharge outlet and rotatable on an axis centrally oit the liquid carrying chamber, substantially as and tor the purpose specified.

14. la combination with a reservoir having an outlet; a pump comprising a piston, a cylinder in which said piston is arranged to reciprocate and divided by said piston into tivo compartments, a valved air inlet to each oit said compartments, means to con neet said air inlets with an air inlet from the ente/rior of the receptacle and outlet means to alternately connect the piston cylinder at opposite sides o'l the piston with the reservoir; to discharge the air trom the compartments at opposite sides of the piston into the reservoir during the reciprocation of the piston, substantially as and for the purpose specified.

15. Tl e combination With a reservoir having an outlet, of a pump in the reser voir comprising a cylinder., a piston 'to reciprocate in said cylinder and divide the cylinder into tivo compartments, a valved air inlet to each oin said compartments, means to connect said air inlets with an air inlet from the exterior of the reservoir, a casing having an outlet leading into the reservoir and a port leading to one ot the cylinder compartments, a valve movable in said casing in direction longitudinally oi the pump cylinder and controlling the opening and closing ot said port, and a valvcd connection leading :trom 'the other cylinder compartment to said casing for the purpose specified.

16. ln a syringe, the combination with a reservoir having an outlet, ot a cylinder therein oin less length than the reservoir and having a connection at opposite ends to the exterior ot the reservoir; outlets at opposite ends oi the cylinder; means to which said outlets are connected to conneet said outlets With the reservoir; a piston to reciprocate in the cylinder; and a rod to reciprocate the piston from the eX- terior of the cylinder and reservoir, and said piston during the reciprocation thereot alternately drawing air to opposite ends et the cylinder, and alternately discharging the air from the opposite ends ot the cylinder through the cylinder outlets into the reservoir, substantially as and for the purpose specied.

17. ln a syringe, the combination With a reservoir having an outlet, of a cylinder therein connected at opposite ends to the exterior of the reservoir; an outlet at one end ot the cylinder; an outlet at the opposite end of the cylinder; a casing to connect said outlets with the reservoir; and a piston to reciprocate in the cylinder; substantially as and tor the purpose specified.

18. ln a syringe, the combination with a reservoir having an outlet, o'lf a cylinder therein; air intakes at opposite ends of the cylincer to connect the cylinder to the eX- terior ot the reservoir; valves in said intakes opening into the cylinder and closing outward therefrom; a valved outlet port in one end of the cylinder leading into the reservoir; a valved outlet port in the opposite end oit the cylinder; means to connect said latter port to the cylinder port con-- nected With the reservoir; and a piston to reciprocate in the cylinder.r substantially as and for the purpose specilied.

19. lin a syringe, the combination ivith reservoir having an outlet; ot a cylinder therein having a head at each end and by means oit one ofv Which heads it is mounted and support-ed in the reservoir; an air intake to the cylinder in each head to conneet the cylinder with the exterior of the reservoir; valves 'for said inlets opening into the cylinder and closing outward 'therefrom; an outlet port n one head of the cylinder; a Valve in said port closing into the cylinder and opening outward therefrom; a chamber connecting said port with 5 the reservoir; an outlet port in the opposite head of Ithe cylinder; a Valve in said port closing into the cy'nder and opening outward therefrom; a tube exterior of the cylinder to connect said latter port with the port in the opposite head connected with the reservoir; and a piston to reciprocate in the cylinder, substantially as and for the purpose specified.

GEO. T. PEARSONS. 

